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Pioneer SX-680 Lytic Capacitor Replacement

L

lourendo

New Member
Hi there. Replacing Electrolytic capacitors on my SX-680. here is the measurements of what i found in my unit. Im still updating so it will change.

Any input on changes are welcomed.

Im planning on replacing them with Nichicon FG series unless you think some other series would make better sense.

Its mostly Filled With Korea Chemi-Con SL series caps with several of the Orange LR low leakage current units.


Came across a pair of interesting caps marked with "CELL"
20160902_011710.jpg
2 other of what i believe are Polystyrene caps. 511J and a 311J
20160831_215607.jpg
and of course the two large, 3 lead 8200mf ELNA power capacitors.

Probably going to change out the transistors to modern replacements.


20160831_200736.jpg 20160831_200746.jpg 20160901_141022.jpg
 
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The price difference is negligible between kz fg kt etc. product lines. I want to put the best capacitors in there that I can get so once i match size, voltage, capacitance, and temp, how do i decide between the product lines? Ideally i will increase the voltage rating by 1 interval, and temp to 105C, but what series would give me the best results?
 
Frankly i dont think you'll notice any difference betwen them. But shure the KZ are their premium caps. So technically they are superior
 
Fredrik 1977 said:
Frankly i dont think you'll notice any difference betwen them. But shure the KZ are their premium caps. So technically they are superior
Click to expand...

when the difference is $0.05 why would i not, especially because the KZ, FG, and KW tend to match original lead spacing and can size more often than not.
 
lourendo said:
when the difference is $0.05 why would i not, especially because the KZ, FG, and KW tend to match original lead spacing and can size more often than not.
Click to expand...
Yes its a no brainer! Go with kz. I was trying answer two of your questions...

About those CELL id realy like to know what they are. Been looking for a datasheet to no vail
 
First of all : Welcome Lourendo! Replace the cap with the same value and the same voltage and or wtih a little bit higher , depend how many room you have in the unit . Fred says a right things : replace , where is it possible the electro with film caps in signal path . With the same value, of course.
 
So here is my list, I will edit it as i work out the replacements. If anyone sees anything off, let me know and i can change it. If I have multiple parts listed, it means im deciding between the listed options, there is a lot to consider and Im a bit confused:/ Thanks

The measurements are in this format, DIA., Length , lead Inner, lead outer, were leads bent.

2x 50v 8000µF 31mm, 64.5mm 13.7mm,15.7mm N UFW1H103MRD
2x 63V 220µF 16mm, 32mm 7.5mm N C403,C404 CEA UPW2A221MHD
1x 50V 2.2µF 5mm, 11.5mm 2mm Y C416 CEA UPW2A2R2MDD
1x 50V 47µF 10mm, 16.5mm 5mm N C335 CEA UPW2A470MPD
1x 50V 220µF 16mm, 25mm 7.5mm N C406 CEA UPW2A221MHD
1x 25V 100µF 10mm, 16mm 5mm N C408 CEA UPW1V101MPDAZHTD
3x 16V 47µF 8mm, 12.5mm 5mm Y C336,C125,C407 CEA UPW1J470MPD
1x 35V 330µF 16mm, 25mm 7.5mm N C405 CEA UPW2A331MHD1CA
4x 35V 4.7µF 5mm, 12mm 2mm Y C219,C122,C132,C165 CEA UPW1H4R7MDD
3x 50V 1µF 5mm, 12mm 1.3mm, 2mm Y C124,C129,C142 CEA FILM? ECQ-E2105JBB
1x 6.3V 220µF 10mm, 12mm 5mm N C164 CEA UPW1V221MPD
5x 50V 3.3µF 5mm, 12mm 2mm Y C331, C332,C333,C334,C167, CEA UPW1H3R3MDD
C501(cant find this one)
2x 16V 10µF 5mm, 12mm 2mm Y C221,C156 CEA UPW1E100MDD
1x 16V 22µF 6.5mm, 12mm 2.5mm Y C158 CEA UPW1J220MED
4x 10V 100µF 8mm, 12mm 3.5mm Slight C209,C210,C313,C314 CEA UPW1V101MPD
1x 35V 220µF 13mm, 24mm 5mm N C415 CEA UPW1H221MPD6
2x 35V 47µF 10mm, 12.7mm 5mm N C311,C312 CEA UPW2A470MPD
2x 6.3V 22µF 5mm, 12mm 2mm Y C309,C310 CEA UPW1A220MDD
1x 25V 47µF 8mm, 14mm 3.5 mm Slight C502 CEA UPW1J470MPD
1x 16V 330µF 13mm, 20mm 5mm N C133 CEA UPW1J331MHD
2x 16V 220µF 10mm, 20mm 5mm N C131,143 CEA UPW1H221MPD6
3x 50V 0.47µF 5.2mm, 12mm 2mm Y C150,C151 CEA film ? ECQ-E2474JB
^1 extra not in schematic tacked onto selector
2x 35V 100µF 10mm, 20mm 5mm N C513,C514 CEA UPW1J101MPD
CELL Marked
2x 25V 47µF 10mm, 13mm 5mm N C205,C206 CEANL UKL1V101KPDANA
LR (low Leakage Caps)
2x 50V 0.47µF, 5.3mm, 14mm 1.8mm, 2.8mm Y C301,C302 CEANL film? ECQ-E2474JB
2x 16V 10µF, 5.3mm, 14mm 1.8mm, 2.8mm Y C329, C330 CEANL UKL1E100KDDANA
6x 50V 2.2µF, 5.3mm, 14mm 1.8mm, 2.8mm Y C203, C204,C211,C212,C511,C512 CEANL UKL1H2R2KDDANA
2x 50V 1µF, 5.3mm, 14mm 1.8mm, 2.8mm Y C138,C141 CEANL film? ECQ-E2105JBB
2x 25V 4.7µF, 5.3mm, 14mm 1.8mm, 2.8mm Y C507,C508 CEANL UKL1H4R7KDDANA

Polystyrene NOS Set of original replacements.

Resistors
4x Wire Wound Ceramic .22Ohm @ 2w 14mm long, 9mm lead spacing

Transistors (per MarkThe Fixer)
6x 2SC1919 KSC1845FTA
2x 2SA725 KSA992FBU
2x 2SA726 KSA992FBU
1x 2SD712 KSC2073TU
1x 2SC1284 KSC2690AYS
 
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You won't notice much if any improvement in SQ using any of the so called "Audio grade" caps in a 680. The CELL is United Chemicon's Low Noise type which would be todays equivalent to the Nichicon UKL. The standard caps are so much better than the originals the the worst cap today is better than the best in 1978.

I would be extremely careful with the (yes it's a polystyrene cap) Poly cap. These normally don't go bad unless they have been exposed to a lot of heat like a soldering iron and not using a heatsink between the iron and the cap (a hemostat is sufficient). Test it and put it back in if it tests good using a hemostat on the lead as a heatsink to keep the cap itself from overheating and being destroyed.

Mark the Fixer, who is one of if not the TOP PIONEER TECH here on AK has done approx 20 years of research on and developed a list of Cap types to be used in PIONEER based on the type (cea, ceanl, cssa, etc) that is on the parts list. I've used this type listing as have thousands of others who have used the caps lists, 99.9% of which were originated by Mark the Fixer. He also vets them when someone puts one up when starting a rehab. So here's Mark the Fixer's Rule of Thumb for Electrolytic Caps in PIONEER Audio Gear (and incidently other brands too.)

I copied this from a post about 7 years ago and it's been more than helpful with regard to what type goes where and if there was a question about the cap, used this and the Tuning Fork volume for caps.

Originally Posted by markthefixer
UPW and UHE from Nichicon is the general purpose e-cap series I usually recommend. Yes, they are 105 degree c caps.
There are Panasonic caps EchoWars recommends as well, they are fine.

THEN there are the low leakage caps, which is some circuit locations DO make a difference. They ARE literally QUIETER.
They are the unique Nichicon UKL series, which was originally just an 85 degree c cap line.
Now there are UKL's that are 105 degrees c rating.

When examining the recap lists (especially the ones I personally did) You will find MANY UKL caps in them.

My "rules of thumb" for caps:
Quote:
Rule of thumb: 0.1uf to 1.0uf of any type >> stacked film DSF(cornell dublier) or ECQ (panasonic)caps
cea >> nichicon upw or uhe caps
ceb > nichicon tvx axial caps or holler for help on these
ceanl, cssa, csza >> nichicon UKL caps - (low noise, low electronic leakage)


It didn't cover non-polarized (or "bi-polar") caps, there are a few, but I can't look up that answer now at this computer about which Nichicon series to use.

The "stacked film" caps are being discontinued in some convenient voltages, but regular ecq's will do.
END QUOTE BY MARK THE FIXER



The following part numbers are examples to show formatting.
Customary format for the parts lists is
Schematic part # ie: Q1 R2,C3
BOARD # ie: AWF-001
Value and Voltage.
Type ie: cea, cssa, ceb, etc.

So a typical part listing would be
Q1, AWF-001, 2sa725
or
R2 AWF-001, 1.8K, 1/2w
or
C3, AWF-001, 220uf/50V CEA

As the 680 is a single board you could delete the board number in your list, or just copy the parts list below, and get it vetted.

This format allows Mark to import it into his excel worksheet for that model, and make changes, improvements and to build a BOM to verify in stock availability @ Mouser.

PIONEER RECAP LISTS THREAD HERE...... http://www.audiokarma.org/forums/index.php?threads/pioneer-recap-lists-sticky-suggestion.457663/
Last/latest 680 recap thread with list Here....... http://www.audiokarma.org/forums/index.php?threads/my-attempt-at-a-sx-680-recap-list.489129/

I would post the list in post #5 and ask for it to be vetted. Once vetted there will be a BOM at the bottom that you can import to the BOM tool at mouser and order. This way it's right, and it's been checked for outdated/obsolete parts, No longer available for saleand get a replacement part # to boot.

Larry
 
CEANL = Capacitor Electrolytic A= radial (leads both on bottom) NL = low leakage or low noise

CEB = Capacitor Electrolytic B = tubular cap with leads on each end at the axis.

find c501? parts list? board? schematic??

parts list, gwm-118 (main) board CEA 3r3p50 c331-c334, c167, c501
means 3.3uf 50v radial plain jane electrolytic

schematic: smooths the output of the q502 level shifter, the shifter is supplied negative bias voltage from the c502, d501, d502 -22v bias supply. it is the muting signal going to the gates of q502 and q504 jfet audio muting gates at the amplifier inputs (anti-pop for switching audio inputs)

physically: there is a row of resistors behind the bass control, next is a row of mixed components, and it is between a 1k (brown black red gold) and a 150k (brown green yellow gold ) resistor. The yellow stands out - not many of them in the unit.

Larry covered capacitor selection well.

Stacked films were nice while they lasted, but there wasn't enough draw for them I guess for the manufacturers to continue making them. They MAY be available up at 250v rating, which will work fine and maybe give you fits fitting it in...
 
Great, I found it, I meant I couldn't find it on the schematic. Mine is pretty low res. Thanks. What do you think of my selections on film caps?
ECQ-E2474JB for the .47uf cea and canl?
ECQ-E2105JBB for the 1uf cea and ceanl?
Thanks again!
 
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